Topic: Catalytic converter suggestion for 3rz swap.

[87pickup]

Im trying to get my exhaust done on my 2002 3rz in my 87 pick up next weekend and am looking for suggestions on converters. Do i need a specific one for the 1st and another for the 2nd or can i use regular hi flow cats from jegs for both the 1st and the 2nd? I am going with 2.25 but dont want to make any mistakes when it comes to catalytic converters.

Thanks

[tech201]

For the first cat you need an obd2 compliant cat or the computers gonna set a cat efficiency code ( i used a cat off a acura 3.2tl ) for the second it shouldn't it's not monitored by the computer.

[Duffil]

not sure about in arizona...how are your smog laws, and is there an O2 sensor in between or after the 2nd cat on the harness? If there is only 1, I wouldn't worry about it, just a highflow cat or whatever will pass your emissions test. if there are 2 or more, I'd run an aftermarket OBD2 cat.

edit: he beat me to the post. looks like there is an o2 after the first cat, so you need an OBD2 cat on it.

[87pickup [OP]]

The 2002 3rz have 2 cats with what toyota calls a air/ fuel metering sensor after the first and a regular o2 sensor after the 2nd. I dont know what the difference is but there was quite a price difference at toyota between the 2.

[87pickup [OP]]

Wow Just checked summit racing and their obdII cats are 255 each.

[Duffil]

yes OBD2 cats are quite a bit more expensive but if you don't run one, it won't run right.

[bigarms23]

a magna flow one